background image

> 6 Min.

> 3 Min.

> 6 Min.

30 sec.

30 sec.

Nominal temperature

Nominal temperature 

-2°C

Fan operation IT

Fan operation AT

Compressor operation AT

Actual 

temperature

Start cooling mode

Cooling mode

Stop cooling mode

Functional diagram

Operation

Stop

In cooling mode, the air in the room is cooled down to the adjusted 

nominal temperature. The desired room temperature is set with the 

/

buttons in 1 °C increments. If the room temperature is 1 °C 

above the selected nominal temperature, then the indoor unit starts 

to cool down the air in the room. The inverter controller checks the 

difference between the adjusted nominal temperature and the actual 

room temperature. In the event of a greater difference, a higher cooling 

performance is created. In the event of a smaller difference, a lower 

cooling performance is created. This serves to maintain the air discharge 

temperature and the room temperature. 

If the adjusted room temperature is lower than approx. 2 °C, then the 

control system turns the cooling function off. To protect the compressor, 

the regulation only turns the cooling on again after a waiting period of 3 

minutes.

COOLING Mode

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Turbo

COOLING 

OPERATION

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Turbo


OR

Hr.

ON            TIMER

Hr.

Off            TIMER

Turbo

SET          TEMP

In dehumidification mode, the room temperature is set to 24 °C. Due to 

the low temperature of the refrigerant, the dew point of the air on the 

evaporator is lower. The excess moisture in the air is condensed by the 

evaporator, the room is dehumidified. The fan speed should be set to 

automatic in order to achieve a maximum level of dehumidification. In 

automatic mode, the fan is switched on and off in intervals.

DEHUMIDIFICATION MODE

DE- 

HUMIDIFICATION 

MODE

30 sec.

Nominal temperature

Nominal temperature 

-2°C

Fan operation IT

Fan operation AT

Compressor operation AT

Actual 

temperature

Start 

Dehumidifying mode

Dehumidifying mode

Stop 

Dehumidifying mode

Functional diagram

Operation

Stop

Low fan speed

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Turbo

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Turbo


OR

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Auto

Turbo

ON/OFF

MODE

Hr.

ON            TIMER

Hr.

Off            TIMER

Turbo

SET          TEMP

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Auto

Turbo

MODE

Hr.

ON            TIMER

Hr.

Off            TIMER

Turbo

SET          TEMP

Hr.

ON            TIMER

Hr.

Off            TIMER

SET          TEMP

Auto

Turbo

9

Summary of Contents for MD 261

Page 1: ...Issue GB T11 REMKO MD MD 261 MD 351 Inverter wall room air conditioner in split design Operation Technology Spare parts...

Page 2: ......

Page 3: ...ecycling 4 Warranty 4 Transport and packaging 5 Description of the equipment 5 Operation 6 12 Shutdown 13 Care and maintenance 13 14 Troubleshooting and customer service 15 16 Installation instruction...

Page 4: ...by qualified personnel The setup connection and operation of the unit and its components must be in accordance with the operating conditions stipulated in this manual and comply with all applicable l...

Page 5: ...ents are met The indoor unit is designed for the upper wall area in the interior It is operated via an infrared remote control The outdoor component consists of a refrigerant circuit with compressor f...

Page 6: ...also be manually operated Problems are shown in code see chapter Troubleshooting and Customer service CAUTION Immediately replace flat batter ies with a new set otherwise there is a risk of leakage I...

Page 7: ...TIMER OFF Button This button serves to program the automatic switch off time for the device within the next 24 hours Buttons on the remote control ON OFF Button Press this button to start the unit MO...

Page 8: ...MODE MODE MODE MODE Hr ON TIMER Hr Off TIMER SET TEMP Auto Turbo Hr ON TIMER Hr Off TIMER SET TEMP Auto Turbo Hr ON TIMER Hr Off TIMER SET TEMP Turbo Hr ON TIMER Hr Off TIMER SET TEMP Turbo Hr ON TIM...

Page 9: ...only turns the cooling on again after a waiting period of 3 minutes Cooling Mode Hr ON TIMER Hr Off TIMER SET TEMP Turbo COOLING OPERATION Hr ON TIMER Hr Off TIMER SET TEMP Turbo OR Hr ON TIMER Hr Off...

Page 10: ...erature is set with the buttons in 1 C increments If the room temperature is 1 C below the selected nominal temperature then the indoor unit starts to warm up the air in the room The inverter controll...

Page 11: ...s by 2 C In heating mode the nominal temperature is decreased after one hour by 1 C and after 2 hours by 2 C The display on the indoor unit goes out With the TURBO function the maximum fan speed can b...

Page 12: ...ng On Off button The timer display on the indoor unit goes out TIMER button Timer On OFF TIMER ON button activation delay TIMER ON Activation delay TIMER OFF button switch off delay Switch off delay M...

Page 13: ...quipment using a damp cloth Do not use any caustic abrasive or solvent based cleaning products Do not use a jet of water Clean the fins on the indoor unit and outdoor component prior to long shutdown...

Page 14: ...Cleaning the filter of the indoor unit 1 Disconnect the supply voltage to the equipment 2 Open the front side of the device by means of folding up the grille and allowing it to engage figure 1 3 Lift...

Page 15: ...re interfering with transmission Does it function when switching off possible sources of interference Signal is not transmitted when interference sources are operational Button on remote control jamme...

Page 16: ...connections must be insulated impervious to vapour diffusion If necessary insulate the condensation pipe also Select an installation location which allows air to freely flow through the inlet and out...

Page 17: ...bracket on the wall or a floor bracket on the ground Minimum clearance to snow 20 cm Snow Windbreak Wind Pipes and cables in wall breakthrough Control cable Condensation pipe Injection pipe Suction p...

Page 18: ...rom outside preferably using sufficiently large air intakes placed opposite each other Figure 4 Minimum clearances Observe the minimum clearances to allow access for maintenance and repair work and fa...

Page 19: ...trical cables and condensation pipe to the indoor unit as described below 4 Hang the indoor unit onto the wall bracket by tilting it back slightly and by pressing the bottom part of the unit against t...

Page 20: ...7 Flanging the refrigerant pipe Refrigerant pipe Deburrer 6 Deburring the refrigerant pipe 8 Correct flange shape Tighten 1 spanner Counter 2 spanner 9 Tighten the fitting Tightening torque 1 4 15 20...

Page 21: ...nt pipes This always takes at least 60 minutes Once any foreign gases and humidity have been completely extracted from the system the valves on the pressure gauge station are closed and the valves on...

Page 22: ...ation hose is designed to be installed on the left side view from front 10 Fall of condensation pipe minimum 2 fall When operating the unit at ambient temperatures below 0 C make sure to route the con...

Page 23: ...standards 3 Terminate the cables as shown on the electrical connection diagram 6 Support the cable in the strain relief and re assemble the unit If an optionally available condensation pump is used o...

Page 24: ...R W Auto Restart Sensor Vaporiser Display screen Swing motor R S C U V W RY3 4 CN6 CN7 CN5 CN4 CN28 Cn26 N B CN3 CN2 CN1 CN15 CN14 CN16 L2 N A 3 Cn10 Sensor air inlet Sensor Vaporiser Display screen...

Page 25: ...ity Check that all fastenings mountings etc are firm and at the correct level Before commissioning Note that the employed refrigerant is always filled in liquid form CAUTION NOTE Check the overheating...

Page 26: ...s described in the chapter Operation Timer temperature setting fan speeds and switching to ventilation or dehumidifying mode 9 Check the correct function of the condensation pipe by pouring distilled...

Page 27: ...Unit dimensions Dimensional and design changes to advance technical progress are reserved MD 261 IT MD 351 IT 280 815 215 MD 261 AT MD 351 AT 760 590 270 530 290 27...

Page 28: ...D 261 IT MD 351 IT 1 Complete front face 1109700 1109714 2 Air filter set 1109701 1109715 3 Board display 1109702 1109716 4 Swing motor 1109703 1109717 5 Air outlet fins set 1109704 1109718 6 Condensa...

Page 29: ...109769 1109786 10 Stop valve injection pipe 1109770 1109787 11 Valve cover 1109771 1109788 12 Reverse flow valve 1109772 1109789 Spare parts not illustrated Control board 1109773 1109790 Condenser com...

Page 30: ...8 9 52 1 2 12 70 Max operating pressure kPa 4200 4200 Data specific to indoor unit MD 261 IT MD 351 IT Adjustment range room temperature C 17 to 30 Working range C 17 to 32 Air flow rate per stage m...

Page 31: ...Notes 31...

Page 32: ...ust advise our clients in the areas of air conditioning and heating technology Customer Service Our equipment is precise and reliable However should a fault should occur REMKO customer service is quic...

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